#pragma once

#include<iostream>
using namespace std;

class Date
{
	friend ostream& operator<<(ostream& out, const Date& d);
	friend istream& operator>>(istream& in, Date& d);
public:
	Date(int year = 1, int month = 1, int day = 1);
	void Print() const;
	bool CheckDate()const;
	int GetMonthDay(int year,int month) const
	{
		static int GetMonthDay[13] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };
		if (month == 2 && (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)))
		{
			return 29;
		}
		return GetMonthDay[month];
	}
	Date& operator+=(int day);
	Date operator+(int day)const;

	Date& operator-=(int day);
	Date operator-(int day)const;

	Date& operator++();
	Date operator++(int);

	Date& operator--();
	Date operator--(int);

	int operator-(const Date& d) const;

	bool operator==(const Date& d)const;
	bool operator>= (const Date & d)const;
	bool operator<=(const Date& d)const;
	bool operator!=(const Date& d)const;
	bool operator>(const Date& d)const;
	bool operator<(const Date& d)const;

	
private:
	int _year;
	int _month;
	int _day;
};

ostream& operator<<(ostream& out, const Date& d);
istream& operator>>(istream& in, Date& d);